BIOENGINEERING STRATEGIES

B I O E N G I N E E R I N G S T R A T E G I E S

Reducing Coastal Erosion and Coastal Storm Damage While Minimizing Impacts



Based on SITE SPECIFIC Criter ia

Understanding if a beach has a

base elevation.



base elevation.

Understanding the function a

fringe marsh plays.



base elevation.

Understanding the function a

fringe marsh plays.

Understanding near shore

characteristics such as fetch, water depths, sand bars, and location

within a given littoral cell.


B I O E N G I N E E R I N G S T R A T E G I E SM A T E R I A L S


Coir Fiber Rolls

Adds stability and protection to the toe of a bank and provides a

window of opportunity to establish vegetation.


Coir Fiber Rolls Robust Anchoring System




Coir Fiber Rolls Erosion Control BlanketingAdds stability and protection to

the toe of a bank and provides a window of opportunity to establish

vegetation.

blanketing of natural fibers are used to stabilize soils allowing time for

native salt tolerate plants become established.

Robust Anchoring System


Coir Fiber Rolls Erosion Control Blanketing

• Resists degradation from the marine environment.

• Absorbs some of the force of wave energy unlike many hard solutions that deflect the energy of wave action to surrounding areas.

• Materials life-expectancy to stabilize sediments matches the time required to

establish native plants.



blanketing of natural fibers are used to stabilize soils allowing time for

native salt tolerate plants become established.

Robust Anchoring System


Native Shrubs Native Grasses


Native Shrubs Native GrassesPre-vegetated Fiber Rolls


Native Shrubs Native GrassesPre-vegetated Fiber Rolls

Salt Marsh


1 0 ’1 0 ’

6 ’6 ’

8 ’8 ’

4 ’4 ’

2 ’2 ’

Root Depths of Native Plant Species

S I D E O A T S G R A M A

B I G B L U E S T E M B A Y B E R R YL I T T L E B L U E S T E M

S W I T C H -G R A S S

I N D I A N G R A S S

B I O E N G I N E E R I N G S T R A T E G I E SI N S T A L L A T I O N & C A S E S T U D I E S

1

1. APPROXIMATELY THREE GROWING SEASONS WILL BEREQUIRED TO CONTROL AND/OR ERADICATE INVASIVEPLANT SPECIES. AFTER THREE GROWING SEASONS,MONITORING AND MINIMAL MAINTENANCE WILL BEONGOING.

2. HERBICIDES ARE TO BE APPLIED BY LICENSEDINDIVIDUALS ONLY.

3. A TEMPORARY, AUTOMATED ABOVE-GROUNDIRRIGATION SYSTEM WILL BE REQUIRED FOR THE FIRSTTWO/THREE GROWING SEASONS WHILE NEW PLANTS AREESTABLISHING. ONCE PLANTS ARE ESTABLISHEDIRRIGATION WILL BE REMOVED.

4. ALL RESTORATION PLANTINGS WILL INCORPORATEEXISTING NATIVE SPECIES UNLESS OTHERWISE SPECIFIEDIN THE APPROVED DOCUMENTS.

5. ANY DISCREPANCIES BETWEEN THE PLANTINGSPECIFICATION AND THE PLAN, THE PLAN SHALL TAKEPRECEDENCE.

6. ALL EXPOSED SOILS WILL BE SEEDED WITH NATIVECAPE COD MEADOW MIX UNLESS OTHERWISE SPECIFIED.

© 2016 WILKINSON ECOLOGICAL DESIGN, INC.

14-Nov-16 k:\clients\south little bay rd_3_orl\consult\plans\restoplan\resto plan_south little bay rd_3_orl.dwg

1 OF 1

CHTK

1" = 20'12/15/16

SANDERS3 South Little Bay Road

Orleans, MA

RESTORATIONPLAN

COASTAL ENGINEERING COMPANY, INC260 CRANBERRY HIGHWAYORLEANS, MA 02653508-255-6511

7 Sweetfern Comptonia peregrina #114 Bayberry Morella caroliniensis #3 - #514 Beach Plum Prunus maritima #3 - #512 Carolina Rose Rosa carolina #3 - #520 Black Chokeberry Aronia melanocarpa #3 - #5

count common name scientific name size

PLANT SPECIFICATIONS

Scale: 1"= 20'RESTORATION PLAN1

N

00 20' 40'

common name scientific name

Broom Sedge Andropogon virginicusCreeping Red Fescue Festuca rubraCrinkle Hair Grass Deschampsia flexuosaFox Sedge Carex vulpinoideaLittle Bluestem Schizachyrium scopariumPurple Lovegrass Eragrostis spectabilisUpland Bentgrass Agrostis perennans

SEEDED MIX FOR COASTAL BANK

100 Butterflyweed Asclepias tuberosa plug - #1100 Early Goldenrod Solidago juncea plug - #150 Seaside Goldenrod Solidago sempervirens plug - #1100 Eastern Showy Aster Eurybia spectabilis plug - #1

WOODY FOR COASTAL BANK


HERBACEOUS SPECIES FOR COASTAL BANK

IMPORTANT NOTES:

1. For coastal stabilization details refer to the plan by Coastal Engineering titled, PlanShowing Proposed Shorefront Protection, C3.1.1 dated 3-8-2017, revised. For coastalstabilization installation protocols refer to the Land Management Plan by WilkinsonEcological Design date 3-7-2017, revised.

COASTAL BANK

26 Sweetfern Comptonia peregrina #117 Carolina Rose Rosa carolina #3 - #5


50 Pennsylvania Sedge Carex Pensylvanica plug - #150 Purple Lovegrass Solidago juncea plug - #150 Soft Rush Juncus effusus plug - #150 Little Bluestem Schizachyrium scoparium plug - #1

WOODY SPECIES FOR RAIN GARDEN


HERBACEOUS SPECIES FOR RAIN GARDEN

RAIN GARDEN

Crinkle Hair Grass Deschampsia flexuosaFox Sedge Carex vulpinoideaLittle Bluestem Schizachyrium scoparium

2. Rain garden to be re-contoured concurrent with inavsiveplant removal. Native grasses to be seeded and plugged directly after swale creation.

1

1

common name scientific name

SEEDED MIX FOR RAIN GARDEN

2

2

B I O E N G I N E E R I N G S T R A T E G I E SR A I N G A R D E N S

I N S T A L L A T I O N & C A S E S T U D I E S

1

T y p i c a l E r o d i n g B a n k

I N S T A L L A T I O N & C A S E S T U D I E SI m p o r t a n c e o f E s t a b l i s h i n g a S t a b l e S l o p e

1

• If the slope of the bottom of the bank is steeper that the upper bank, it is likely unstable and prone to slumping or collapses .

(Storm Smart Properties Fact Sheet 4)


21

I m p o r t a n c e o f E s t a b l i s h i n g a S t a b l e S l o p e• Utilizing a portion of the upper bank can create a more stable slope angle.

• Adds increased stability and storm damage prevention to the bank.

• Without this step, an investment in bioengeneering can be lost due to bank collapses.

(Storm Smart Properties Fact Sheet 4)


31 2

S t a b i l i z i n g t o e o f b a n k - F i b e r r o l l s• Installation begins at the base of the array and proceeds up bank.

• Proper anchoring strategy to hold toe protection in place.

• Synthetic filter fabrics DO NOT ENHANCE success of a bioengineering project.


31 2

S t a b i l i z i n g t o e o f b a n k - P r e - v e g e t a t e d f i b e r r o l l s• Use of pre-vegetated fiber rolls along top of array.

• Added vegetation to the root matrix.

• Full season of plant growth prior to installation.


431 2

S t a b i l i z i n g s o i l s a b o v e t o e p r o t e c t i o n• Native salt tolerant grasses are seeded into the bank prior to installation of erosion

control blankets.

• Protect soils from erosion and helps to retain moisture to promote seed germination.

S W I T C H -G R A S S

S I D E O A T S G R A M A

L I T T L E B L U E S T E M


431 2

• 6” deep lock-in trench at top and bottom of slope.

• Overlap blankets a minimum of 6”.

• Use appropriate staking to match the sediment.

• Only run orientation of blankets perpendicular to the contours (up and down slope).

S t a b i l i z i n g s o i l s a b o v e t o e p r o t e c t i o n


53 41 2

N a t i v e s h r u b s p e c i e s • Native beach plum and bayberry planted through erosion control blanketing.

• Temporary above ground irrigation for plant establishment.


63 4 51 2

• Establishment of native vegetation after two seasons of growth.

•


73 4 5 61 2

C o n d i t i o n o f f i b e r r o l l a r r a y f o l l o w i n g H u r r i c a n e S a n d y1 1 / 2 0 1 2

W a v e s r e a c h e d a b o v e f i b e r r o l l a r r a y w i t h n o d a m a g e .


83 4 5 6 71 2

C o n d i t i o n o f f i b e r r o l l a r r a y f o l l o w i n g n a m e d s t o r m e d N e m o 2 / 2 0 1 3


83 4 5 6 71 2

C o n d i t i o n o f f i b e r r o l l a r r a y f o l l o w i n g n a m e d s t o r m e d N e m o 2 / 2 0 1 3

W a v e s r e a c h e d a b o v e f i b e r r o l l a r r a y w i t h n o d a m a g e .


3 4 5 6 7 8 91 2

F i b e r r o l l a r r a y i n c r e a s e d i n l e n g t h b y 9 0 ’6 / 2 0 1 3

P h a s e 1 P h a s e 2


3 4 5 6 7 8 9 1 01 2

I m p o r t a n c e o f F r i n g e M a r s h e s i n C o a s t a l S t a b i l i z a t i o n

I m p o r t a n c e o f F r i n g e M a r s h e s i n C o a s t a l S t a b i l i z a t i o n• Woven coir mats used as a growing medium.

• Pre-vegeated to establish prior before installation.


F i b e r R o l l A r r a y

B e a c h E l e v a t i o n

H i g h T i d e



H i g h T i d e



B e a c h E l e v a t i o n

H i g h T i d e

I N S T A L L A T I O N & C A S E S T U D I E SF r i n g e M a r s h e s

1


1 2

F r i n g e M a r s h e s


1 2 3



1 2 3 4



1 2



3 41 2


I N S T A L L A T I O N & C A S E S T U D I E SF r i n g e M a r s h e s



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BIOENGINEERING STRATEGIES